Climate Control
Author
Discussion

bennyboydurham

Original Poster:

1,617 posts

204 months

Monday 5th January 2015
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My 730d has automatic climate control. It works well. I leave it in auto mode on 21 degrees C most of the year. If I'm a bit warm I turn it down a few degrees or if it's a very chilly day I turn it up to maybe 22 or 23. The A/C is left on so the windows are kept clear and it ramps up slowly so I don't get blasted with icy cold air until the engine has got up to temperature.

So how come so many people I travel with faff about with the heating and cooling for the entire journey? I can't cope being a rear seat passenger in my mother in law's car as first of all you get frozen by the icy blast of the heating 'on full' while the engine warms up and then the windows steam up because the A/C is off and then you'll alternatively freeze/boil as the heating goes on and off like a switch. It's not only the temp but all the attempts to direct the flow through various vents. Sweet Jesus just put it on auto and leave it!! I can't be alone in this, Shirley?

zimzoom

61 posts

142 months

Monday 5th January 2015
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I take it her car has an auto option on the A/C. Does she know about it?

bennyboydurham

Original Poster:

1,617 posts

204 months

Monday 5th January 2015
quotequote all
zimzoom said:
I take it her car has an auto option on the A/C. Does she know about it?
She does. And I've demonstrated it. But to no avail.

Patrick Bateman

13,208 posts

204 months

Monday 5th January 2015
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The number of otherwise apparently intelligent people that do this beggars belief. I don't understand why.

Diderot

9,685 posts

222 months

Monday 5th January 2015
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Divorce your wife. Before you re-marry make sure new outlaw can operate the climate control to the requisite standard, and Bob is your uncle etc.

Transiter

257 posts

143 months

Monday 5th January 2015
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Women see the heater control as an on and off switch, no in between.

I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.

BrewsterBear

1,548 posts

222 months

Monday 5th January 2015
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Transiter said:
Women see the heater control as an on and off switch, no in between.

I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
^This^

My girlfriend cannot fathom that climate control will take care of everything if you just leave it alone. The aircon is perennially off unless it's roasting and the heater is either full blast or off altogether. The number of times I've set it to 21°C with aircon on auto and tried to explain that it will do everything it can to maintain that, but she still doesn't get it. Absolutely infuriating.

GT03ROB

14,032 posts

251 months

Monday 5th January 2015
quotequote all
BrewsterBear said:
Transiter said:
Women see the heater control as an on and off switch, no in between.

I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
^This^

My girlfriend cannot fathom that climate control will take care of everything if you just leave it alone. The aircon is perennially off unless it's roasting and the heater is either full blast or off altogether. The number of times I've set it to 21°C with aircon on auto and tried to explain that it will do everything it can to maintain that, but she still doesn't get it. Absolutely infuriating.
I've got one of those too...drives me nuts. Stop fiddling woman & let it do what it does. But no turns the heat to full then turns it right down then turns it up again, non stop all journey. Turns the a/c off totally in the winter then wonders why the inside of the screen is covered in condensation, mad

crazy about cars

4,454 posts

199 months

Monday 5th January 2015
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Pretty sure there's a similar thread lately...

Anyway I always do the same too leaving the AC in AUTO mode unless I need to quickly defrost.
The only thing I control manually is the recirculation mode which I normally leave turned off unless I'm stuck in traffic behind a bus.

From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG or will drain the battery...

TheBALDpuma

5,941 posts

198 months

Monday 5th January 2015
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GT03ROB said:
BrewsterBear said:
Transiter said:
Women see the heater control as an on and off switch, no in between.

I've spent years telling others that if they leave the blower on the lowest setting the windows will not fog up, but instead they turn it off until you can't see out of the window then they put it on the max setting.
^This^

My girlfriend cannot fathom that climate control will take care of everything if you just leave it alone. The aircon is perennially off unless it's roasting and the heater is either full blast or off altogether. The number of times I've set it to 21°C with aircon on auto and tried to explain that it will do everything it can to maintain that, but she still doesn't get it. Absolutely infuriating.
I've got one of those too...drives me nuts. Stop fiddling woman & let it do what it does. But no turns the heat to full then turns it right down then turns it up again, non stop all journey. Turns the a/c off totally in the winter then wonders why the inside of the screen is covered in condensation, mad
And here.

Long journeys visting family or whatever will ALWAYS result in an argument over the temp of the car. I like it at a cool 18 degrees where as the OH would rather it would be at 26! Also, she'll say things like "It won't warm us up because it's not blowing hot air on us, just put it on the face vent on hot for like 2 minutes and it will warm me up". She's an intelligent girl, but she just didn't understand that when I then put it back on auto at say 20 degrees it would cool it back down again! There is something about the female mind that doesn't understand thermostats!

AW111

9,674 posts

163 months

Monday 5th January 2015
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I have an MR2 with 1987 vintage climate control (and cruise control - luxury!)
Although the aircon is good, the fastest way to cool the car after it's been parked in the sun in summer is to drop both windows until some of the heat soak has gone. Black interior & 40+ degrees is not a good combination.
I have to turn the AC off auto until the temperature has dropped, or the fan runs flat out and the noise annoys me.

SteveSteveson

3,209 posts

193 months

Monday 5th January 2015
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crazy about cars said:
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG
And they would be right, at least at low speeds.

GetCarter

31,296 posts

309 months

Monday 5th January 2015
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SteveSteveson said:
crazy about cars said:
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG
And they would be right, at least at low speeds.
Indeed. The compressor takes power from the engine. But who cares when you're too hot!

TheBALDpuma

5,941 posts

198 months

Monday 5th January 2015
quotequote all
SteveSteveson said:
crazy about cars said:
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG
And they would be right, at least at low speeds.
I've tested this over probably 100s of tanks of fuel, and there is no significant difference between A/C on and A/C off - I think the fact of the matter is that other factors contribute so much more that the A/C won't show an impact either way.

SteveSteveson

3,209 posts

193 months

Monday 5th January 2015
quotequote all
GetCarter said:
SteveSteveson said:
crazy about cars said:
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG
And they would be right, at least at low speeds.
Indeed. The compressor takes power from the engine. But who cares when you're too hot!
I'm not saying you shouldn't use it, just that it does affect fuel consumption. Worth bearing in mind that on a warmish day you may be better off opening a window than running the AC if your worried about fuel consumption.

TheBALDpuma said:
I've tested this over probably 100s of tanks of fuel, and there is no significant difference between A/C on and A/C off - I think the fact of the matter is that other factors contribute so much more that the A/C won't show an impact either way.
Anecdotal evidence is not evidence:

www.autoexpress.co.uk/car-news/31861/mpg-mythbuste...

It can make quite a big difference, depending on how you drive and how you use AC.

RicksAlfas

14,559 posts

274 months

Monday 5th January 2015
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SteveSteveson said:
Anecdotal evidence is not evidence:

www.autoexpress.co.uk/car-news/31861/mpg-mythbuste...

It can make quite a big difference, depending on how you drive and how you use AC.
It sounds like an older style "AC" button doesn't it, rather than automatic climate control which cuts the AC pump in and out as and when it's required. I believe the older AC or snowflake buttons just turn it on and leave it on.

Article says:
"Air-conditioning

The first test simply involved pushing a button on the centre console to activate the air-con. There was a slight change in engine revs as Alan did it, then he and Anthony headed out on to the route.

Sixteen minutes later, they were back – with some dramatic results. “It’s made an eight per cent difference,”"

V8forweekends

2,501 posts

154 months

Monday 5th January 2015
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I've had a number of girlfriends who freely admitted (pre climate control days) that they had no idea at all what most of the heating/aircon controls did, and they just sawed away randomly at them.

Best of all was the Kiwi who religiously selected recirculation (no aircon) and then complained her windscreen was always misting up. She was an otherwise intelligent woman but for some reason had a mental block about car heating controls.

heners54

286 posts

169 months

Monday 5th January 2015
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A gripe of mine is when giving people a lift they get in the car and straight away turn the dial round to the 'hot' position.
1. It's not your car, don't touch stuff without asking.
2. It's climate control, the weather is cold so it will blow hot air, several people I know seem to struggle with the concept of climate versus a blower/air con.
3. If the engine is cold, the air will be cold, moving the dials won't change this!

The number of people who have paid for climate and have no concept of how it works must be huge!

GetCarter

31,296 posts

309 months

Monday 5th January 2015
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TheBALDpuma said:
I've tested this over probably 100s of tanks of fuel, and there is no significant difference between A/C on and A/C off - I think the fact of the matter is that other factors contribute so much more that the A/C won't show an impact either way.
Read this: http://www.airconditioningforcars.co.uk/ACpage05.h...

TheBALDpuma

5,941 posts

198 months

Monday 5th January 2015
quotequote all
SteveSteveson said:
GetCarter said:
SteveSteveson said:
crazy about cars said:
From recent conversations with work colleague it seems that most people believe leaving the AC on will affect the MPG
And they would be right, at least at low speeds.
Indeed. The compressor takes power from the engine. But who cares when you're too hot!
I'm not saying you shouldn't use it, just that it does affect fuel consumption. Worth bearing in mind that on a warmish day you may be better off opening a window than running the AC if your worried about fuel consumption.

TheBALDpuma said:
I've tested this over probably 100s of tanks of fuel, and there is no significant difference between A/C on and A/C off - I think the fact of the matter is that other factors contribute so much more that the A/C won't show an impact either way.
Anecdotal evidence is not evidence:

www.autoexpress.co.uk/car-news/31861/mpg-mythbuste...

It can make quite a big difference, depending on how you drive and how you use AC.
Are you calling my evidence anecdotal, or your article! Your article is one guy, driving 8 minutes on each and basing his assumptions on this - that's the very definition of anecdotal and proves nothing as driving style, traffic etc will have had a much larger influnce I would have thought.

My evdience is all my driving, but covers three cars, probably 6 years and literally 100s of fill ups. Yes I have spread sheets and some spare time!